Wow... A major archeological site and they get 2 (two) whole days to go through it, because the business promoters want to make their money as fast as possible.
Not cool.
Not cool.
Back when I did rescue archeology, 2 days was a lot closer to the time spent on a specific site than 8 years. 1w-2mo is more typical, but the parts I can read don't make clear whether 2 days was the entire extent of the excavations, it's just a narrative entry point where they're rushing to finish before they leave.
The goal is just to recover and map all artifacts and their position, cleaning, tagging and figuring out what are they can be done offsite.
But - the good news - they're just building houses for people on this site. If, at some point in the future, we decide that looking at some old sherds of pottery and a wall is more important than housing - we can just tear the houses down and start digging again.